syzkaller login: [ 30.671924] BUG: Bad rss-counter state mm:00000000f5e706d9 type:MM_FILEPAGES val:33 [ 30.673163] BUG: Bad rss-counter state mm:00000000f5e706d9 type:MM_ANONPAGES val:22 [ 30.829274] ================================================================== [ 30.830173] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.831108] Read of size 8 at addr ffff88801a31adf0 by task sshd/220 [ 30.831887] [ 30.832106] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.833064] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.834053] Call Trace: [ 30.834369] [ 30.834746] dump_stack_lvl+0x91/0xf0 [ 30.835348] print_report+0xcc/0x620 [ 30.835926] ? __virt_addr_valid+0x102/0x340 [ 30.836576] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.837302] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.838037] kasan_report+0xbe/0xf0 [ 30.838601] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.839387] vma_interval_tree_remove+0xc75/0xec0 [ 30.840016] vma_prepare+0xc54/0x11a0 [ 30.840493] __split_vma+0x5af/0x950 [ 30.840957] ? __pfx___split_vma+0x10/0x10 [ 30.841486] ? find_held_lock+0x2c/0x110 [ 30.842004] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.842567] ? lock_is_held_type+0x9f/0x120 [ 30.843119] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.843721] ? mtree_range_walk+0x632/0x900 [ 30.844272] ? mas_walk+0x5c7/0x7c0 [ 30.844747] do_vmi_munmap+0x1f1/0x2b0 [ 30.845237] mmap_region+0x1f9/0x2660 [ 30.845718] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.846223] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.846941] ? __pfx_lock_acquire+0x10/0x10 [ 30.847469] ? __pfx_mmap_region+0x10/0x10 [ 30.847990] ? security_mmap_addr+0x7d/0xa0 [ 30.848515] ? get_unmapped_area+0x1f5/0x3f0 [ 30.849063] do_mmap+0x854/0xf00 [ 30.849502] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.849998] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.850550] ksys_mmap_pgoff+0x3af/0x500 [ 30.851072] do_syscall_64+0x3f/0x90 [ 30.851554] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.852198] RIP: 0033:0x7fa273cc7d82 [ 30.852656] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 30.854775] RSP: 002b:00007fffd78c38c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.855688] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa273cc7d82 [ 30.856531] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa273101000 [ 30.857381] RBP: 00007fa273101000 R08: 0000000000000009 R09: 0000000000001000 [ 30.858236] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561586abfb20 [ 30.859090] R13: 00007fffd78c38e0 R14: 00007fffd78c3910 R15: 00007fffd78c3c70 [ 30.859949] [ 30.860241] [ 30.860458] Allocated by task 213: [ 30.860882] kasan_save_stack+0x22/0x50 [ 30.861379] kasan_set_track+0x25/0x30 [ 30.861867] __kasan_slab_alloc+0x59/0x70 [ 30.862390] kmem_cache_alloc+0x16b/0x370 [ 30.862925] vm_area_dup+0x20/0x160 [ 30.863384] __split_vma+0x170/0x950 [ 30.863847] split_vma+0xc6/0x110 [ 30.864288] mprotect_fixup+0x8d2/0xb30 [ 30.864783] do_mprotect_pkey+0x87e/0xd40 [ 30.865300] __x64_sys_mprotect+0x78/0xc0 [ 30.865827] do_syscall_64+0x3f/0x90 [ 30.866301] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.866955] [ 30.867168] Freed by task 213: [ 30.867575] kasan_save_stack+0x22/0x50 [ 30.868077] kasan_set_track+0x25/0x30 [ 30.868564] kasan_save_free_info+0x2b/0x50 [ 30.869090] __kasan_slab_free+0x10a/0x190 [ 30.869621] kmem_cache_free+0x10d/0x4d0 [ 30.870129] rcu_core+0x8c8/0x2860 [ 30.870571] __do_softirq+0x1b7/0x7d4 [ 30.871063] [ 30.871275] Last potentially related work creation: [ 30.871861] kasan_save_stack+0x22/0x50 [ 30.872366] __kasan_record_aux_stack+0x8e/0xa0 [ 30.872932] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.873574] remove_vma+0x139/0x170 [ 30.874028] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.874576] do_vmi_munmap+0x1f1/0x2b0 [ 30.875060] __vm_munmap+0x138/0x3a0 [ 30.875523] __x64_sys_munmap+0x59/0x80 [ 30.876015] do_syscall_64+0x3f/0x90 [ 30.876484] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.877122] [ 30.877335] The buggy address belongs to the object at ffff88801a31ad98 [ 30.877335] which belongs to the cache vm_area_struct of size 168 [ 30.878795] The buggy address is located 88 bytes inside of [ 30.878795] freed 168-byte region [ffff88801a31ad98, ffff88801a31ae40) [ 30.880205] [ 30.880427] The buggy address belongs to the physical page: [ 30.881083] page:0000000069569adc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a31a [ 30.882162] memcg:ffff888018ead601 [ 30.882591] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.883233] page_type: 0xffffffff() [ 30.883692] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.884604] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018ead601 [ 30.885507] page dumped because: kasan: bad access detected [ 30.886168] [ 30.886384] Memory state around the buggy address: [ 30.886970] ffff88801a31ac80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.887815] ffff88801a31ad00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.888660] >ffff88801a31ad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.889504] ^ [ 30.890310] ffff88801a31ae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.891168] ffff88801a31ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.892011] ================================================================== [ 30.893299] Disabling lock debugging due to kernel taint [ 32.822533] BUG: Bad rss-counter state mm:00000000fa6b403b type:MM_FILEPAGES val:33 [ 32.823448] BUG: Bad rss-counter state mm:00000000fa6b403b type:MM_ANONPAGES val:22 [ 33.260046] BUG: Bad rss-counter state mm:00000000227b0521 type:MM_FILEPAGES val:33 [ 33.260625] BUG: Bad rss-counter state mm:00000000227b0521 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31626' (ECDSA) to the list of known hosts. 2023/06/21 06:13:06 fuzzer started 2023/06/21 06:13:06 dialing manager at localhost:36067 2023/06/21 06:13:06 checking machine... 2023/06/21 06:13:06 checking revisions... [ 33.947607] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:13:06 testing simple program... [ 34.000055] cgroup: Unknown subsys name 'net' [ 34.043676] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:13:06 Registers: info registers vcpu 0 RAX=ffffffff81370a8a RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11002bbdda6 RSI=ffffffff81370a8a RDI=ffff888015deeda0 RBP=ffff888015deed70 RSP=ffff888015deecd0 R8 =0000000000000001 R9 =ffff888015deed18 R10=0000000000038001 R11=0000000000020ed2 R12=ffff888015deeda0 R13=0000000000000000 R14=ffff888015f1b680 R15=ffff888015def1f8 RIP=ffffffff813ad474 RFL=00000282 [--S----] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd1677ca900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fd167783008 CR3=0000000013a02000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f56b8a8c290 CR3=00000000097d4000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2035303a33313a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a33313a3630203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000